Nitryl hexafluorophosphate19200-21-6100 % similar Nitronium tetrafluoroborate13826-86-350 % similar Ammonium hexafluorophosphate16941-11-035 % similar Nitrosonium hexafluorophosphate16921-91-835 % similar Potassium hexafluorophosphate17084-13-833 % similar Sodium hexafluorophosphate21324-39-033 % similar Lithium hexafluorophosphate21324-40-333 % similar Silver hexafluorophosphate26042-63-733 % similar Tetramethylammonium hexafluorophosphate558-32-730 % similar